Being bitten is one of the most prevalent indicators of a bed bug infestation. Bed bugs are nocturnal and feed on human and pet blood while you sleep, leaving behind itchy bites on your skin. If you notice clusters of small, red bites on your body, especially on areas like arms, legs, and neck, it could be a sign of a bed bug infestation. Another sign to look out for is bloodstains. Bed bugs can be crushed while feeding, leaving behind small bloodstains on bedding, mattresses, or walls. Look for tiny red or brown stains on your sheets, pillowcases, or walls near your bed. Bed bugs of UK also excrete dark, rusty-colored fecal matter that looks like small dots or smears on bedding, mattresses, or walls.

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Look for these signs near your bed or other areas where you suspect bed bugs may be hiding. Another early sign of bed bugs is shed skins. Bed bugs shed their skins as they grow, leaving behind tiny, translucent skins that are about the size of a pinhead. Look for these skins on your bedding, mattress, or in cracks and crevices near your bed.